Practice. Now that you have your dancing style, lessons, and have chosen the moves that look best on your body, you need to put that knowledge into action! The best way to do this is freestyle dancing in the privacy in your bedroom, and then when you're at an average dancing level, attend school dances to enjoy yourself!
Be healthy both mentally and physically. Dance is a very demanding sport. It is essential to eat a healthy, balanced diet and keep hydrated. If you feel that you are overdoing it, talk to your dance teacher and ask if it is possible to drop a class